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A kind of ultra-high strength stress relaxation resistance, excellent bending forming conductive copper alloy and its preparation method and application

A stress relaxation-resistant, conductive copper alloy technology, applied in conductive materials, conductive materials, metal/alloy conductors, etc., can solve problems such as failure of elastic components, poor bending performance, and complex processing technology.

Active Publication Date: 2021-10-15
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the king of elasticity of non-ferrous metal materials, beryllium copper has incomparable performance advantages compared to other materials, but because beryllium has serious damage to human health and the environment, and the processing technology of beryllium bronze alloy is complicated and the actual production is difficult, especially the alloy When working for a long time in an environment exceeding 150°C, the stress relaxation resistance of the alloy decreases significantly. After working at 150°C for 1000 hours, it drops to 75% of the original value, resulting in the failure of elastic components.
In addition, the bending formability of beryllium bronze alloy is poor, and it is impossible to prepare miniaturized elastic components

Method used

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  • A kind of ultra-high strength stress relaxation resistance, excellent bending forming conductive copper alloy and its preparation method and application
  • A kind of ultra-high strength stress relaxation resistance, excellent bending forming conductive copper alloy and its preparation method and application
  • A kind of ultra-high strength stress relaxation resistance, excellent bending forming conductive copper alloy and its preparation method and application

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preparation example Construction

[0078] The present invention provides the preparation method of the conductive copper alloy described in the above technical scheme, comprising the following steps:

[0079] Melting and casting the alloy raw material according to the above-mentioned ratio of alloy elements to obtain a copper alloy ingot;

[0080] The copper alloy ingot is sequentially subjected to hot rolling, face milling, solution treatment, first aging treatment, first cold rolling, second aging treatment, second cold rolling and annealing treatment to obtain the conductive copper alloy.

[0081] In the present invention, unless otherwise specified, all raw material components are commercially available products well known to those skilled in the art.

[0082] According to the above alloy element ratio, the invention melts and casts alloy raw materials to obtain copper alloy ingots.

[0083] The present invention has no special requirements on the source of the alloy raw material, and commercially availabl...

Embodiment 1

[0108] According to the mass ratio of the alloying elements in Example 1 in Table 1, electrolytic copper, titanium sponge, copper-chromium master alloy, pure cobalt and copper-silicon master alloy are added to the vacuum induction furnace, and after the above raw materials are all melted, continue to add copper For the boron intermediate alloy, raise the temperature to 1300°C, stir evenly after the alloy melt is completely melted, control the casting temperature at 1250°C, keep it warm for 30 minutes, and then cast to obtain a copper alloy ingot;

[0109] The copper alloy ingot is placed in a stepping box furnace for heating at a temperature of 800°C and a holding time of 4 hours, then hot rolling is carried out, and the final rolling temperature is controlled at 650°C, followed by water cooling;

[0110] Place the hot-rolled slab of the above alloy in a box furnace for heating, the solution treatment temperature is 1000°C, the holding time is 4h, and the cooling method is wate...

Embodiment 2

[0118] According to the mass ratio of the alloy elements in Example 2 in Table 1, electrolytic copper, titanium sponge, copper-chromium master alloy, pure cobalt and copper-silicon master alloy are added to the vacuum induction furnace, and after the above materials are all melted, continue to add copper For the boron intermediate alloy, raise the temperature to 1400°C, stir evenly after the melt is completely melted, control the casting temperature at 1350°C, keep it warm for 30 minutes, and then cast to obtain copper alloy ingots;

[0119] The copper alloy ingot is placed in a stepping box furnace for heating at a temperature of 900°C and a holding time of 4 hours, then hot rolling is carried out, and the final rolling temperature is controlled at 750°C, followed by water cooling;

[0120] Place the hot-rolled slab of the above alloy in a box furnace for heating, the solution treatment temperature is 850°C, the holding time is 6h, and the cooling method is water cooling;

[...

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Abstract

The invention relates to the technical field of non-ferrous metal processing, in particular to an ultra-high-strength stress-relaxation-resistant, excellent bending-forming conductive copper alloy and a preparation method and application thereof. The conductive copper alloy provided by the invention regulates the composition and microstructure of the copper-based elastic alloy through the synergistic effect of alloy elements, controls the growth of high-temperature-resistant phases and the precipitation of discontinuous precipitated phases, and obtains a variety of micro-nano-sized structures. The precipitated phase is dispersed in the matrix. At the same time, the type and composition of the texture are regulated on the basis of the above microstructure through the synergistic mechanism between various alloy elements. The finally obtained conductive copper alloy has ultra-high strength and stress resistance. The excellent properties of relaxation and excellent bending and forming fully meet the requirements for the use of copper alloy materials for precision connector terminals of high-end electronic components used in aerospace, 5G communications, smart terminals and other fields.

Description

technical field [0001] The invention relates to the technical field of non-ferrous metal processing, in particular to an ultra-high-strength stress-relaxation-resistant, excellent bending-forming conductive copper alloy and a preparation method and application thereof. Background technique [0002] With the development of modern science and technology, high-end technology industries such as electronic information, 5G communications, and smart terminals are in a stage of rapid development, and the demand for copper-based elastic alloys for elastic components such as connectors and connectors is increasing. At the same time, more stringent requirements are put forward for the performance of copper-based elastic alloys, such as requiring alloys to have high strength, high elasticity, high resistance to stress relaxation, and excellent bending forming properties. [0003] At present, the copper-based elastic alloys in the domestic market are mainly made of tin phosphor bronze an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/00C22C1/02C22F1/08H01B1/02
CPCC22C1/02C22C9/00C22F1/08H01B1/026
Inventor 彭丽军黄国杰米绪军解浩峰李增德黄树晖刘冬梅杨振张文婧张习敏李卿
Owner GRIMAT ENG INST CO LTD
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